The Arctic tern is a “migratory marvel.” In the current issue of National Wildlife, science writer Jessica Snyder Sachs reports that last year an international team of researchers employed geolocators—tiny …

Stroll across a Midwestern prairie anytime between late spring and early fall, and you’ll rarely be out of ear shot of the dickcissel’s distinctive trill: see-see, dick-dick, ciss-ciss-ciss. Stocky, streaked, …